[petsc-dev] moab nightlybuild failure

[Jed Brown]

Satish Balay <balay at mcs.anl.gov> writes:

> And just as with git - were we have to query [or store] the current
> local state [so as to compare with whats in moab.py or equivalent] -
> we would have to store & query the current state of stuff obtained
> from tarballs in a similar manner.

Given an arbitrary working tree, how would you verify whether it's
up-to-date with a stated URL, short of always downloading (and caching?)
the URL and unpacking it every time?

Compare to

  $ git checkout -f $gitcommit
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